使用 fetch 和 get 方法调用 API

Question

我必须在 api 调用中设置一个标头。我的 POST API 调用工作正常。但是在我的 get api 调用中，没有设置标头。

return fetch('http://api-call.com', {
  method: 'GET',
  headers: {
    Accept: 'application/json',
    'Content-Type': 'application/json',
    'custom-security':'XXXX',
    'Purchase-Code':'XXXXXXX',
    'Content-Type':'application/json',
    'Cache-Control':'max-age=640000'
  }
})
.then((response) => response.json())
.then((responseJson) => {
  console.log(responseJson);
})
.catch((error) => {
  console.error(error);
});

Answer 1

您应该设置一个Request 对象并将您的标头包装到Headers 对象中，例如：

var request = new Request('http://api-call.com', {
    method: 'GET',
    headers: new Headers({
       'Accept': 'application/json',
       'custom-security':'XXXX',
       'Purchase-Code':'XXXXXXX',
       'Content-Type':'application/json',
       'Cache-Control':'max-age=640000'
    })
});

然后只需使用您的 request 作为参数调用 fetch：

fetch(request)
    .then((response) => response.json())
    .then((responseJson) => {
        console.log(responseJson);
    })
    .catch((error) => {
        console.error(error);
    });

查看reference

Answer 2

2021 年回答：以防万一您在这里寻找如何使用 async/await 或 Promise 发出 GET 和 POST Fetch api 请求（与 axios 相比）。

我用jsonplaceholder fake API来演示：

使用 async/await 获取 api GET 请求：

         const asyncGetCall = async () => {
            try {
                const response = await fetch('https://jsonplaceholder.typicode.com/posts');
                 const data = await response.json();
                // enter you logic when the fetch is successful
                 console.log(data);
               } catch(error) {
            // enter your logic for when there is an error (ex. error toast)
                  console.log(error)
                 } 
            }


          asyncGetCall()

使用 async/await 获取 api POST 请求：

    const asyncPostCall = async () => {
            try {
                const response = await fetch('https://jsonplaceholder.typicode.com/posts', {
                 method: 'POST',
                 headers: {
                   'Content-Type': 'application/json'
                   },
                   body: JSON.stringify({
             // your expected POST request payload goes here
                     title: "My post title",
                     body: "My post content."
                    })
                 });
                 const data = await response.json();
              // enter you logic when the fetch is successful
                 console.log(data);
               } catch(error) {
             // enter your logic for when there is an error (ex. error toast)

                  console.log(error)
                 } 
            }

asyncPostCall()

使用 Promises 获取请求：

  fetch('https://jsonplaceholder.typicode.com/posts')
  .then(res => res.json())
  .then(data => {
   // enter you logic when the fetch is successful
    console.log(data)
  })
  .catch(error => {
    // enter your logic for when there is an error (ex. error toast)
   console.log(error)
  })

使用 Promises 的 POST 请求：

fetch('https://jsonplaceholder.typicode.com/posts', {
  method: 'POST',
  headers: {
    'Content-Type': 'application/json',
  },
   body: JSON.stringify({
     // your expected POST request payload goes here
      title: "My post title",
      body: "My post content."
      })
})
  .then(res => res.json())
  .then(data => {
   // enter you logic when the fetch is successful
    console.log(data)
  })
  .catch(error => {
  // enter your logic for when there is an error (ex. error toast)
   console.log(error)
  })  

使用 Axios 获取请求：

        const axiosGetCall = async () => {
            try {
              const { data } = await axios.get('https://jsonplaceholder.typicode.com/posts')
    // enter you logic when the fetch is successful
              console.log(`data: `, data)
           
            } catch (error) {
    // enter your logic for when there is an error (ex. error toast)
              console.log(`error: `, error)
            }
          }
    
    axiosGetCall()

使用 Axios 验证的 POST 请求：

const axiosPostCall = async () => {
    try {
      const { data } = await axios.post('https://jsonplaceholder.typicode.com/posts',  {
      // your expected POST request payload goes here
      title: "My post title",
      body: "My post content."
      },{
          headers: {
               Authorization:
            `Bearer ${token}`
          }
         })
   // enter you logic when the fetch is successful
      console.log(`data: `, data)
   
    } catch (error) {
  // enter your logic for when there is an error (ex. error toast)
      console.log(`error: `, error)
    }
  }


axiosPostCall()